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The nitty gritty

Size chart

5.5

6

6.5

7

7.5

8

8.5

9

9.5

10

10.5

11

11.5

12

U.S. Women's

5.5

6

6.5

7

7.5

8

8.5

9

9.5

10

10.5

11

11..5

12

UK

3.5

4

4.5

5

5.5

6

6.5

7

7.5

8

8.5

9

9.5

10

EU

36

37

37.5

38

38.5

39

40

40.5

41

42

42.5

43

44

44.5

Sizing notes

Altra’s unique FootShape™ toe boxes and Zero Drop™ platforms create a straighter shape compared to typical running shoes. This design gives your toes room to spread and allows your feet to remain in a flat, natural position. When fitting, be sure to allow a full thumb’s width in front of your toes. If your feet are used to cramped toe boxes, Altra shoes may feel a little big at first. Give your toes some time to get used to the newfound wiggle room.